交通信号灯英文翻译
交通信号灯英语作文小学
文章标题：Traffic Lights: The Guardians ofOur StreetsTraffic lights, those bright beacons of safety that dot our streets, play a crucial role in ensuring the smooth flow of traffic and the safety of pedestrians. They are the silent guardians, directing us when to stop, when to go, and when to yield. As children, we learn the basic rules of traffic lights: red means stop, yellow means prepare to stop, and green means go. But there's more to these simple signals than meets the eye.The history of traffic lights dates back to the late19th century, evolving from gas-powered to electric-powered systems. Today, they are a sophisticated combination of electronics and engineering, designed to maximize safety and efficiency. Each color of the traffic light carries a specific meaning and purpose. Red, the universal symbol of danger, alerts us to stop and wait. Yellow, a warning, prepares us to slow down and be ready to stop. And green, the signal of permission, tells us we can proceed, but always with caution.As we grow up, understanding traffic lights becomes more than just a matter of safety; it's a lesson in patience and respect. Waiting at a red light teaches us to be patient, to not rush, and to respect the rules that keep us all safe. Yielding to other vehicles or pedestrians at a yellow or flashing red light teaches us to be considerate and mindful of others.Moreover, traffic lights are not just for cars and pedestrians. They also govern the movement of bicycles, motorcycles, and even emergency vehicles. Each mode of transportation must adhere to the signals, ensuring that everyone shares the road safely.In our daily lives, we encounter traffic lights countless times, often without realizing their full impact. But they are there, silently guiding us, protecting us, and ensuring that our journey is as safe as it can be.So, the next time you approach a traffic light, take a moment to appreciate its significance. Think about the engineering behind it, the safety it provides, and the lessons it teaches. Remember, traffic lights are not just a part of the urban landscape; they are the guardians of ourstreets, keeping us safe and allowing us to move forward, one step at a time.**交通信号灯：街道的守护者**交通信号灯，那些点缀在我们街道上的明亮安全灯塔，在确保交通顺畅和行人安全方面发挥着至关重要的作用。
与交通有关的单词
与交通有关的单词单词：traffic1. 定义与释义1.1词性：名词1.2释义：路上行驶的车辆或行人；交通流量；运输；贸易。
1.3英文解释：The vehicles, pedestrians, etc. moving along a road or street; the volume of this; transportation or trade.1.4相关词汇：同义词有transportation、vehicular movement；派生词有traffic - light（交通信号灯）、traffic - jam（交通堵塞）。
2. 起源与背景2.1词源：源于古法语“trafique”，最初表示“贸易、商业活动”，后来逐渐也包含了道路上的运输往来等意思，该词来源于意大利语“trafico”，源头可追溯到拉丁语“trans - ”（穿过）和“facere”（做）。
2.2趣闻：在一些大城市，交通拥堵已经成为了一种标志性的城市问题。
例如，在洛杉矶，由于城市布局较为分散且汽车保有量极高，交通拥堵现象十分严重，人们每天花费大量时间在交通上，甚至催生了专门为堵车时提供服务的行业，如移动咖啡车等。
3. 常用搭配与短语3.1短语：- traffic accident：交通事故例句：There was a serious traffic accident on the highway this morning.翻译：今天早上高速公路上发生了一起严重的交通事故。
- heavy traffic：交通繁忙例句：We were late for the meeting because of the heavy traffic.翻译：由于交通拥堵，我们开会迟到了。
- traffic rules：交通规则例句：Everyone should abide by the traffic rules.翻译：每个人都应该遵守交通规则。
译林版六年级下册Unit4（含中文翻译）
译林版六年级下册Unit4（含中⽂翻译）Unit 4 Story time Road safety马路安全There are many busy roads in the city. How can you cross them safely?城市⾥有很多条繁忙的马路。
你怎样才能安全地穿过它们？First, you must look for a zebra crossing. Then, you must look at the traffic lights and wait for thegreen man. ⾸先，你必须寻找斑马线。
然后，你必须看交通灯，等待绿灯⼈像。
Can you see the red man? You mustn't cross the road now.你能看见红灯⼈像吗？现在你禁⽌穿过马路。
Look! Here's the green man.You can cross the road now.看！这是绿灯⼈像。
现在你可以穿过马路。
Sometimes, you cannot find a zebra crossing near you.To keep safe, you can wait on thepavement and look out for cars and bikes. You must first look left, then right and then left again.You can also cross the road with other people. Then the drivers can see you easily.有时，你在你的附近找不到斑马线。
为了保持安全，你可以在⼈⾏道上等待并且当⼼⼩汽车和⾃⾏车。
你必须⾸先看左边，接着(看)右边，然后再(看)左边。
你也可以和其他⼈⼀起穿过马路。
那么司机可以很容易地看见你们。
六年级英语下册素材-Unit4 Road safety课文翻译 译林版(三起)
Unit4 Road safety第四单元马路安全Story timeRoad safety马路安全There are many busy roads in the city. How can you cross them safely?城市里有很多条繁忙的马路。
你怎样才能安全地穿过它们？First, you must look for a zebra crossing. Then, you must look at the traffic lights and wait for the green man.首先，你必须寻找斑马线。
然后，你必须看交通灯，等待绿灯人像。
Can you see the red man? You mustn't cross the road now.你能看见红灯人像吗？现在你禁止穿过马路。
Look! Here's the green man.You can cross the road now.看！这是绿灯人像。
现在你可以穿过马路。
Sometimes, you cannot find a zebra crossing near you.To keep safe, you can wait on the pavement and look out for cars and bikes. You must first look left, then right and then left again. You can also cross the road with other people. Then the drivers can see you easily.有时，你在你的附近找不到斑马线。
为了保持安全，你可以在人行道上等待并且当心小汽车和自行车。
你必须首先看左边，接着(看)右边，然后再(看)左边。
你也可以和其他人一起穿过马路。
那么司机可以很容易地看见你们。
traffic的中文翻译
traffic的中文翻译traffic的中文翻译是"交通"。
下面是一些关于traffic的用法和中英文对照的例句：1. Traffic jam - 交通堵塞- The heavy rain caused a huge traffic jam on the highway. (大雨导致高速公路上发生了严重的交通堵塞。
)- We were stuck in a traffic jam for over an hour. (我们被困在交通堵塞中超过一个小时。
)2. Traffic congestion - 交通拥堵- The city is notorious for its traffic congestion during rush hour. (这个城市在高峰时段因交通拥堵而臭名昭著。
)- The government is implementing measures to ease traffic congestion in the city center. (政府正在采取措施缓解市中心的交通拥堵。
)3. Traffic control - 交通管制- The police were called to the scene to take control of the traffic. (警察被召唤到现场控制交通。
)- During the marathon, there will be traffic control in place to ensure the safety of the runners. (马拉松期间将会实施交通管制，以确保参赛者的安全。
)4. Traffic rules - 交通规则- It's important to follow traffic rules to avoid accidents. (遵守交通规则以避免事故是很重要的。
)- The driver was fined for not obeying the traffic rules. (这名司机因不遵守交通规则而被罚款。
小学生英语作文交通信号灯
小学生英语作文交通信号灯When I walk to school every morning, I always pay close attention to the traffic lights. They are an essential part of our daily life, ensuring the safety of pedestrians and vehicles alike.The traffic light system is simple yet effective. It consists of three colors: red, yellow, and green. The red light means "stop," signaling drivers to halt their vehicles and wait for the light to change. It's important for everyone to obey this signal to prevent accidents.The yellow light serves as a warning that the light is about to change to red. It tells drivers to slow down and prepare to stop. It's a brief moment to adjust before the red light comes on.Finally, the green light is the signal for "go." It's a go-ahead for drivers to proceed with caution. However, even when the light is green, it's still important to look out for pedestrians and other vehicles.As a student, I've learned that traffic lights are not just for cars. They also help us cross the street safely. When the pedestrian light turns green, it's our turn to walk across. But we must always look both ways before stepping onto the road.In conclusion, traffic lights are a crucial part of our transportation system. They help maintain order and safety on the roads. By understanding and following the signals, we can all contribute to a safer community.。
交通灯外文翻译2
Traffic lightsSignal control is a necessary measure to maintain the quality and safety of traffic circulation. Further development of present signal control has great potential to reduce travel times, vehicle and accident costs, and vehicle emissions. The development of detection and computer technology has changed traffic signal control from fixed-time open-loop regulation to adaptive feedback control. Present adaptive control methods, like the British MOV A, Swedish SOS (isolated signals) and British SCOOT (area-wide control), use mathematical optimization and simulation techniques to adjust the signal timing to the observed fluctuations of traffic flow in real time. The optimization is done by changing the green time and cycle lengths of the signals. In area-wide control the offsets between intersections are also changed. Several methods have been developed for determining the optimal cycle length and the minimum delay at an intersection but, based on uncertainty and rigid nature of traffic signal control, the global optimum is not possible to find out.As a result of growing public awareness of the environmental impact of road traffic many authorities are now pursuing policies to:− manage demand and congestion;− influence mode and route choice;− improve priority for buses, trams and other public service vehicles;− provide better and safer facilities for pedestrians, cyclists and other vulnerable road users;− reduce vehicle emissions, noise and visual intrusion; and− improve safety for all road user groups.In adaptive traffic signal control the increase in flexibility increases the number of overlapping green phases in the cycle, thus making the mathematical optimization very complicated and difficult. For that reason, the adaptive signal control in most cases is not based on precise optimization but on the green extension principle. In practice, uniformity is the principle followed in signal control for traffic safety reasons. This sets limitations to the cycle time and phase arrangements. Hence, traffic signal control in practice are based on tailor-made solutions and adjustments made by the traffic planners. The modern programmable signal controllers with a great number of adjustable parameters are well suited to this process. For good results, an experienced planner and fine-tuning in the field is needed. Fuzzy control has proven to be successful in problems where exact mathematical modelling is hard orimpossible but an experienced human can control the process operator. Thus, traffic signal control in particular is a suitable task for fuzzy control. Indeed, one of the oldest examples of the potentials of fuzzy control is a simulation of traffic signal control in an inter-section of two one-way streets. Even in this very simple case the fuzzy control was at least as good as the traditional adaptive control. In general, fuzzy control is found to be superior in complex problems with multiobjective decisions. In traffic signal control several traffic flows compete from the same time and space, and different priorities are often set to different traffic flows or vehicle groups. In addition, the optimization includes several simultaneous criteria, like the average and maximum vehicle and pedestrian delays, maximum queue lengths and percentage of stopped vehicles. So, it is very likely that fuzzy control is very competitive in complicated real intersections where the use of traditional optimization methods is problematic.Fuzzy logic has been introduced and successfully applied to a wide range of automatic control tasks. The main benefit of fuzzy logic is the opportunity to model the ambiguity and the uncertainty of decision-making. Moreover, fuzzy logic has the ability to comprehend linguistic instructions and to generate control strategies based on priori communication. The point in utilizing fuzzy logic in control theory is to model control based on human expert knowledge, rather than to model the process itself. Indeed, fuzzy control has proven to be successful in problems where exact mathematical modelling is hard or impossible but an experienced human operator can control process. In general, fuzzy control is found to be superior in complex problems with multi-objective decisions.At present, there is a multitude of inference systems based on fuzzy technique. Most of them, however, suffer ill-defined foundations; even if they are mostly performing better that classical mathematical method, they still contain black boxes, e.g. de fuzzification, which are very difficult to justify mathematically or logically. For example, fuzzy IF - THEN rules, which are in the core of fuzzy inference systems, are often reported to be generalizations of classical Modus Ponens rule of inference, but literally this not the case; the relation between these rules and any known many-valued logic is complicated and artificial. Moreover, the performance of an expert system should be equivalent to that of human expert: it should give the same results that the expert gives, but warn when the control situation is so vague that an expert is not sure about the right action. The existing fuzzy expert systems veryseldom fulfil this latter condition.Many researches observe, however, that fuzzy inference is based on similarity. Kosko, for example, writes 'Fuzzy membership...represents similarities of objects to imprecisely defined properties'. Taking this remark seriously, we study systematically many-valued equivalence, i.e. fuzzy similarity. It turns out that, starting from the Lukasiewicz well-defined many-valued logic, we are able to construct a method performing fuzzy reasoning such that the inference relies only on experts knowledge and on well-defined logical concepts. Therefore we do not need any artificial defuzzification method (like Center of Gravity) to determine the final output of the inference. Our basic observation is that any fuzzy set generates a fuzzy similarity, and that these similarities can be combined to a fuzzy relation which turns out to a fuzzy similarity, too. We call this induced fuzzy relation total fuzzy similarity. Fuzzy IF - THEN inference systems are, in fact, problems of choice: compare each IF-part of the rule base with an actual input value, find the most similar case and fire the corresponding THEN-part; if it is not unique, use a criteria given by an expert to proceed. Based on the Lukasiewicz welldefined many valued logic, we show how this method can be carried out formally.Hypothesis and Principles of Fuzzy Traffic Signal Control Traffic signal control is used to maximize the efficiency of the existing traffic systems [6]. However, the efficiency of traffic system can even be fuzzy. By providing temporal separation of rights of way to approaching flows, traffic signals exert a profound influence on the efficiency of traffic flow. They can operate to the advantage or disadvantage of the vehicles or pedestrians; depend on how the rights of ways are allocated. Consequently, the proper application, design, installation, operation, and maintenance of traffic signals is critical to the orderly safe and efficient movement of traffic at intersections.In traffic signal control, we can find some kind of uncertainties in many levels. The inputs of traffic signal control are inaccurate, and that means that we cannot handle the traffic of approaches exactly. The control possibilities are complicated, and handling these possibilities are an extremely complex task. Maximizing safety, minimizing environmental aspects and minimizing delays are some of the objectives of control, but it is difficult to handle them together in the traditional traffic signal control. The causeconsequence- relationship is also not possible to explain in traffic signal control. These are typical features of fuzzy control.Fuzzy logic based controllers are designed to capture the key factors forcontrolling a process without requiring many detailed mathematical formulas. Due to this fact, they have many advantages in real time applications. The controllers have a simple computational structure, since they do not require many numerical calculations. The IFTHEN logic of their inference rules does not require much computational time. Also, the controllers can operate on a large range of inputs, since different sets of control rules can be applied to them. If the system related knowledge is represented by simple fuzzy IFTHEN- rules, a fuzzy-based controller can control the system with efficiency and ease. The main goal of traffic signal control is to ensure safety at signalized intersections by keeping conflict traffic flows apart. The optimal performance of the signalized intersections is the combination of time value, environmental effects and traffic safety. Our goal is the optimal system, but we need to decide what attributes and weights will be used to judge optimality.The entire knowledge of the system designer about the process, traffic signal control in this case, to be controlled is stored as rules in the knowledge base. Thus the rules have a basic influence on the closed-loop behaviour of the system and should therefore be acquired thoroughly. The development of rules is time consuming, and designers often have to translate process knowledge into appropriate rules. Sugeno and Nishida mentioned four ways to derive fuzzy control rules:1. operators experience2. control engineer's knowledge3. fuzzy modelling of the operator's control actions4. fuzzy modelling of the process5. crisp modeling of the process6. heuristic design rules7. on-line adaptation of the rules.Usually a combination of some of these methods is necessary to obtain good results. As in conventional control, increased experience in the design of fuzzy controllers leads to decreasing development times.The main goals of FUSICO-research project are theoretical analysis of fuzzy traffic signal control, generalized fuzzy rules for traffic signal control using linguistic variables, validation of fuzzy control principles and calibration of membership functions, and development of a fuzzy adaptive signal controller. The vehicle-actuated control strategies, like SOS, MOV A and LHOVRA, are the control algorithms of the first generation. The fuzzy control algorithm can be one of the algorithms of thesecond generation, the generation of artificial intelligence (AI). The fuzzy control is capable of handling multi-objective, multi-dimensional and complicated traffic situations, like traffic signalling. The typical advantages of fuzzy control are simple process, effective control and better quality.FUSICO-project modelled the experience of policeman. The rule base development was made during the fall 1996. Mr. Kari J. Sane, experienced traffic signal planner, was working at the Helsinki University of Technology at this time. Everyday discussions and working groups helped us to model his experience to our rules.In particular pathological traffic jams or situations where there are very few vehicles in circulation; there first-in-first-out is the only reasonable control strategy. The Algorithm is looking for the most similar IF-part to the actual input value, and the corresponding THEN-part is then fired. Three realistic traffic signal control systems were constructed by means of the Algorithm and a simulation model tested their performance. Similar simulations were made to a non-fuzzy and classical Mamdani style fuzzy inference systems, too. The results with respect to average vehicle and pedestrian delay or average vehicle delay were in most cases better on fuzzy similarity based control than on the other control systems. Comparisons between fuzzy similarity based control and Mamdani style fuzzy control also strength an assumption that, in approximate reasoning, a fundamental concept is many-valued similarity between objects rather than a generalization of classical Modus Ponens rule of inference.The results of this project have indicated that fuzzy signal control is the potential control method for isolated intersections. The comparison results of Pappis-Mamdani control, fuzzy isolated pedestrian crossing and fuzzy two-phase control are good. The results of isolated pedestrian crossing indicate that the fuzzy control provides the effective compromise between the two opposing objectives, minimum pedestrian delay and minimum vehicle delay. The results of two-phase control and Pappis-Mamdani control indicate that the application area of fuzzy control is very wide. The maximum delay improvement was more than 20 %, which means that the efficiency of fuzzy control can be better than the efficiency of traditional vehicle-actuated control.According to these results, we can say that the fuzzy signal control can be multiobjective and more efficient than conventional adaptive signal control nowadays.The biggest benefits can, probably, be achieved in more complicated intersections and environments. The FUSICO-project continues. The aim is to move step by step to more complicated traffic signals and to continue the theoretical work of fuzzy control. The first example will be the public transport priorities.交通灯信号控制是一种必要的措施以确保的质量和安全,交通循环。
译林版六年级下册 Unit4(含中文翻译)
Unit 4 Story time Road safety马路安全There are many busy roads in the city. How can you cross them safely?城市里有很多条繁忙的马路。
你怎样才能安全地穿过它们？First, you must look for a zebra crossing. Then, you must look at the traffic lights and wait for thegreen man. 首先，你必须寻找斑马线。
然后，你必须看交通灯，等待绿灯人像。
Can you see the red man? You mustn't cross the road now.你能看见红灯人像吗？现在你禁止穿过马路。
Look! Here's the green man.You can cross the road now.看！这是绿灯人像。
现在你可以穿过马路。
Sometimes, you cannot find a zebra crossing near you.To keep safe, you can wait on thepavement and look out for cars and bikes. You must first look left, then right and then left again.You can also cross the road with other people. Then the drivers can see you easily.有时，你在你的附近找不到斑马线。
为了保持安全，你可以在人行道上等待并且当心小汽车和自行车。
你必须首先看左边，接着(看)右边，然后再(看)左边。
你也可以和其他人一起穿过马路。
那么司机可以很容易地看见你们。
Some children run or play football on the road. This is not safe. You must not play on the roadbecause there are many cars and bikes. 一些孩子在马路上跑或者踢足球。
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交通信号灯当今，红绿灯安装在各个道口上，已经成为疏导交通车辆最常见和最有效的手段。
社会的发展，人们的消费水平不断的提高，私人车辆不断的增加。
人多、车多道路窄的道路交通状况已经很明显了。
所以采用有效的方法控制交通灯是势在必行的。
PLC 的智能控制原则是控制系统的核心，采用PLC把东西方向或南北方向的车辆按数量规模进行分档，相应给定的东西方向与南北方向的绿灯时长也按一定的规律分档. 这样就可以实现按车流量规模给定绿灯时长，达到最大限度的有车放行，减少十字路口的车辆滞流，缓解交通拥挤、实现最优控制，从而提高了交通控制系统的效率.PLC的应用正在不断地走向深入，同时带动传统控制检测日新月益更新。
它具有结构简单、编程方便、可靠性高等优点，已广泛用于工业过程和位置的自动控制中。
由于PLC具有对使用环境适应性强的特性，同时其内部定时器资源十分丰富，可对目前普遍使用的“渐进式”信号灯进行精确控制，特别对多岔路口的控制可方便地实现。
因此现在越来越多地将PLC应用于交通灯系统中。
同时，PLC本身还具有通讯联网功能，将同一条道路上的信号灯组成一局域网进行统一调度管理，可缩短车辆通行等候时间，实现科学化管理。
在实时检测和自动控制的PLC应用系统中，PLC往往是作为一个核心部件来使用。
.. 21世纪，PLC会有更大的发展。
从技术上看，计算机技术的新成果会更多地应用于可编程控制器的设计和制造上，会有运算速度更快、存储容量更大、智能更强的品种出现；从产品规模上看，会进一步向超小型及超大型方向发展；从产品的配套性上看，产品的品种会更丰富、规格更齐全，完美的人机界面、完备的通信设备会更好地适应各种工业控制场合的需求；从市场上看，各国各自生产多品种产品的情况会随着国际竞争的加剧而打破，会出现少数几个品牌垄断国际市场的局面，会出现国际通用的编程语言；从网络的发展情况来看，可编程控制器和其它工业控制计算机组网构成大型的控制系统是可编程控制器技术的发展方向。
目前的计算机集散控制系统DCS中已有大量的可编程控制器应用。
伴随着计算机网络的发展，可编程控制器作为自动化控制网络和国际通用网络的重要组成部分，将在工业及工业以外的众多领域发挥越来越大的作用。
在中国机动车量的不断增加，许多大城市如北京、上海、南京等地出现了交通超负荷运行的情况，交通事故的问题也越来越严重。
并且由于各种特殊车辆（如120急救车、119火警车、110警车及各种特种车辆）在紧急情况之下不受红灯限制，也给交通带来很多不便，甚至造成交通事故。
而且，目前大多数交通灯在同一时刻都会出现两个或两个以上方向同时为绿灯的情况，也增加了交通事故的发生率。
因此，设计一种专为特殊车辆通过而不至于引发任何交通事故、正常交通控制时任何时刻只有一个方向通行绿灯的现代化智能交通灯控制系统是迫切需要的。
Nowadays, traffic lights installed in each cro ssin g, has b eco me the mo st co mmo n and d red ge the traffic, the mo st effective means.The develop ment o f the society, peo p le's co nsump tio n level unceasing enhancement, p rivate vehicles unceasing increase. And mo re cars ro ad s are narro w road traffic is clear. So ado p ting effective metho d to co ntro l the traffic light is imp erative. P LC intelligent co ntro l p rincip le is the core o f the co ntro l system, P LC p ut the thin gs d irectio n o r north-so uth d irectio n acco rd ing to q uantity o f vehicles,the co rrespo nd in g scale what d iv id es class given the green light d irectio n betwee n no rth andso uth d irectio n accord ing to certain rules to o lo ng. It can realize d iv ides class accord ing to a given the green cars d uratio n scale o f maximum car release, red uce crossroads veh icles, ease traffic co ngestio n stagnatio n, realize the op timal co ntro l, so as to imp ro ve the efficiency o f the traffic co ntro l system.The app licatio n o f P LC is co ntin uo usly, and d rive to the d eep enin g trad it io nal co ntro l test new mo nth benefit up dates. It is simp le in structure, p ro gramming and high reliab ility etc, co nvenient alread y widely used in ind ustrial p rocesses and posit io n in the auto matic co ntro l. Due to use o f P LC has the characteristics o f env iro nmental adaptab le, and its internal timer is very rich in reso urces, b ut the current wid ely used "p ro gressive" lig hts, esp ecially fo r precise co ntro l mo re than thecro ssway co ntro l can b e easily realized. So no w increasing ly app lying PLC traffic lig ht system.Meanwh ile, P LC itself also has co mmun icatio n netwo rk ingfunctio n, will the same path as part o f a LAN signa l un ified d ispatching management, can shorten the traffic wait times, realize scient ific management. In real-time detectio n and auto matic co ntro l o f P LCapp licatio n system, P LC is o ften used as a co re co mpo nents.In the 21st century, P LC will have greater d evelop ment. Technically, the co mp uter techno lo gy can morely new achievements used inpro grammab le co ntro ller d esign and manu facturin g, there will be faster, storage and larger cap acity,intelligent stro nger varieties ap pear; Loo k fro m p rod uct size, can further to min i and sup er-large d irectio n; Lo ok fro m p rod uct co mp atib ility,the variety o f o ur p rod ucts will be more rich, specificatio n mo re co mp lete, p erfect man-machine interface and co mp lete co mmu nicatio n eq uip ment can better adap t to all k ind s o find ustrial co ntro l o ccasio n demands; Loo k fro m the market, allco untries to their p rod uctio n o f mu lt ip le p rod ucts with internatio nalco mpetitio n intensifies and b reak, can app ear a few brand mo nopo ly internatio nal market situatio n, can appear internatio nal gene ralpro grammin g languages; Jud ging fro m the develop ment o f the netwo rk, pro grammab le co ntro ller and o ther ind ustrial co ntro l co mp uternetwork ing co nstitute a large co ntro l system is p ro grammab le co ntro ller techno lo gy d evelo p ment d irectio n. The current co mp uter d istrib utedco ntro l system DCS has alread y a lot o f p ro grammab le co ntro llerapp licatio ns. Alo ng with the d evelop ment o f co mp uter netwo rk, thepro grammab le co ntro ller as auto matio n co ntro l netwo rk andinternatio nal general netwo rk will b e an imp ortant p art o f the ind ustry and ind ustry, the nu mero us field s o utsid e p lay an increasin g ro le.In C hina the increasin g amo unt o f mo to r vehicles,many b ig cities like Beijing, S hanghai,nanjing and o ther gro und ap peared traffico verload running co nd itio n, traffic accidents prob lem also mo re andmo re serio us. And b ecause the vario us special vehicles (such as an amb ulance, 119 120 car, p o lice and vario us special veh icle 110 in emergency situatio ns, b y red under limited to t raffic bring a lo t o finco nvenience, even cause traffic accid ent. And no w, mo st traffic lig hts at the same mo ment will ap pear two o r mo re than two d irectio n at the same time for the green situatio n, and increase the incid ence o f the traffic accid ent. There fo re, design a k ind o f designed fo r sp ecial vehicles thro ugh and no t cause any traffic accid ent,no rmal trafficco ntro l any time o nly o ne d irectio n o f mod ern intelligent traffic light green traffic co ntro l system is urgently needed.。